A Mn-based LMOF with an AIEgens ligand for selective detection of Fe3+, CrO42- and Cr2O72- ions in aqueous solution

摘要

A novel multifunctional chemical sensor Mn-based LMOF, namely, [Mn(tipe)(4)(ndc)Cl](n)(LMOF-1) was solvothermally synthesized by introducing an aggregation-induced emission luminogens (AIEgens) ligand, 1,1,2,2-tetrakis(4-(1H -imidazole-1-yl)-phenyl)ethane, and analyzed by single crystal X-ray diffraction, thermogravimetric and powder X-ray diffraction and other methods. The analysis of the structure showed that LMOF-1 crystallized in a monoclinic system, P2(1)/n space group. LMOF-1 has high stability and strong luminescence properties in solutions. The sensing experiments testify that it can be used as a selectively multifunctional sensor for Fe3+, CrO42- and Cr2O72-, with high quenching coefficient (Ksv) values at 11924 M-1, 16078 M-1 and 18744 M-1, respectively. Noticeably, there found that the Ksv value of Cr2O72- was the highest among published literature.

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